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Multifaceted Decay of Cs116

J. Dey1,2, U. Datta1,2,*, O. Tengblad3, P. Das1,2,4, A. Rahaman5,6, B. K. Agrawal1, S. Chakraborty7, A. Gottberg8,9, M. Kowalska8 et al. (ISOLDE Collaboration)

M. Kowalska8, K. Mahata10,2, S. Mandal11, M. Madurga8,12, E. Nacher3, E. Rapisarda8, N. Warr13,14, W. Sengupta1,2, C. Sharma1, and T. Stora8 (ISOLDE Collaboration)

  • *Contact author: ushasi.dattapramanik@saha.ac.in
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Phys. Rev. Lett. 137, 012501 – Published 29 June, 2026

DOI: https://doi.org/10.1103/ztcl-lpdf

Abstract

The multifaceted decay properties of Cs116 near the proton drip line have been studied at ISOLDE, CERN. More than six new unbound states of Xe116 have been identified. A novel phenomenon of low energy isoscalar octupole resonance has been observed. After proton decay, that state populates both 11/2+ and 11/2− states of I115. First observation of delayed two protons is reported in the medium heavy region and this exotic decay mode is 3 orders of magnitude lower than the delayed single proton events. The fingerprint of long-range proton-proton correlation has been evidenced in the relative momentum of two protons. An indication of rare event, heavy cluster emission (C12) in medium heavy nucleus is reported.

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Corrections

17 July, 2026

Correction: The Collaboration name was missing from the byline and has been added.

Article Text

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Information

Phys. Rev. Lett. 137, 012501– Published 29 June, 2026
  • Received 18 November 2025
  • Revised 30 January 2026
  • Accepted 20 May 2026
  • Corrected 17 July 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by CERN.

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